<template>
  <HomePanel title="人气推荐" sub-title="人气爆款 不容错过" ref="target">
    <ul ref="pannel" class="goods-list">
      <li v-for="item in goods" :key="item.id">
        <RouterLink to="/">
        <!-- 图片懒加载优化 -->
          <!-- <img :src="item.picture" alt=""> -->
            <img v-imgLazy="item.picture" alt="">

          <p class="name">{{item.title}}</p>
          <p class="desc">{{item.alt}}</p>
        </RouterLink>
      </li>
    </ul>
  </HomePanel>
</template>

<script>
import { ref } from 'vue'
import HomePanel from './HomePanel.vue'
import { findHot } from '@/api/home'
// import { useIntersectionObserver } from '@vueuse/core'
import { useLazyData } from '@/compositions'

export default {
  name: 'HomeNew',
  components: { HomePanel },
  setup () {
    const goods = ref([])

    // 数据懒加载
    // const target = ref(null)
    // const { stop } = useIntersectionObserver(
    //   target,
    //   ([{ isIntersecting }], observerElement) => {
    //     if (isIntersecting) {
    //       stop()
    //       findHot().then(data => {
    //         goods.value = data.result
    //       })
    //     }
    //   },
    //   { threshold: 0 }
    // )
    // 数据懒加载优化
    const fn = () => {
      findHot().then(data => {
        goods.value = data.result
      })
    }
    const target = useLazyData(fn)
    return { goods, target }
  }
}
</script>

<style scoped lang='less'>
.goods-list {
  display: flex;
  justify-content: space-between;
  height: 426px;
  li {
    width: 306px;
    height: 406px;
    .hoverShadow();
    img {
      width: 306px;
      height: 306px;
    }
    p {
      font-size: 22px;
      padding-top: 12px;
      text-align: center;
    }
    .desc {
      color: #999;
      font-size: 18px;
    }
  }
}
</style>
